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09-06-2017, 06:52 PM
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#1
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Member
Join Date: Aug 2017
Location: Gold Bar, WA
Posts: 125
Year: 1991
Coachwork: Bluebird
Chassis: TC 2000
Engine: 5.9 L Cummins Turbo
Rated Cap: 28
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raised floor
In reading how most people here do their floor I am second guessing my decision to make a 1 x 2 grid on the floor, put fiberglass insulation (less toxic and flammable) between the grids then nail the plywood into the framework. Presume I will have to attach my base floor grid to the metal, but want to avoid making holes in the floor after I plug all the ones that were left behind by seats, etc. so will keep that to a minimum. My current floor is showing lots of wet wood, and thought by gluing the plywood to the metal as they did, that it held in the moisture and I want there to be an air space instead. No obvious areas of leaks besides near the wheel wells.
Anyone else do their floor this way? Also seems to be lots of rust where bolts and screws went through metal floor - is there a way to mitigate that for any new bolts/screws I add, like using stainless?
Thanks.
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09-06-2017, 07:25 PM
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#2
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Bus Nut
Join Date: May 2015
Location: Minnesota
Posts: 502
Year: 92
Coachwork: Thomas Built
Chassis: International 3800
Engine: DTA360 5.9L
Rated Cap: 77
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thats how i did my floor, after raising the roof though. link to the build is in my signature there. try for January 2017 in my build and it should be around there. also did it without putting holes in my floor because i welded them all shut.
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09-06-2017, 08:00 PM
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#3
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Bus Nut
Join Date: Jun 2016
Location: Lafayette, Indiana
Posts: 332
Year: 2003
Engine: DT530
Rated Cap: 84
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I would avoid fiberglass insulation because it holds water like a sponge.
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09-06-2017, 08:02 PM
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#4
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by T-Bolt
I would avoid fiberglass insulation because it holds water like a sponge.
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Very true.
I'd rather have empty space with nothing but air as insulation than have fiberglass.
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09-06-2017, 08:07 PM
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#5
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Bus Nut
Join Date: Apr 2017
Location: Ridge Manor, FL
Posts: 311
Year: 1993
Coachwork: Carpenter
Chassis: Ford B600
Engine: Cummins 5.9
Rated Cap: 20 person
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There was another type of insulation i read in another post it was similar to rock wool. It was not supposed to hold water and was fireproof. I can't seem to find the thread now though.
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09-06-2017, 08:19 PM
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#6
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by BowserJournal
There was another type of insulation i read in another post it was similar to rock wool. It was not supposed to hold water and was fireproof. I can't seem to find the thread now though.
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Roxul.
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09-06-2017, 08:25 PM
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#7
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Member
Join Date: Aug 2017
Location: Gold Bar, WA
Posts: 125
Year: 1991
Coachwork: Bluebird
Chassis: TC 2000
Engine: 5.9 L Cummins Turbo
Rated Cap: 28
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Didn't realize that. Foam board burns and spray foam is toxic so will have to find something else.
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09-06-2017, 08:38 PM
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#8
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Bus Nut
Join Date: Apr 2017
Location: Ridge Manor, FL
Posts: 311
Year: 1993
Coachwork: Carpenter
Chassis: Ford B600
Engine: Cummins 5.9
Rated Cap: 20 person
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Should have known CB would know!
__________________
"Living Our Own Story"
The Bowser Journal
Watch our adventures by subscribing...
Youtube - bit.ly/TheBowserJournal
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09-06-2017, 10:02 PM
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#9
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Bus Geek
Join Date: Sep 2014
Location: Eustis FLORIDA
Posts: 23,764
Year: 1999
Coachwork: Thomas
Chassis: Freighliner FS65
Engine: Cat 3126
Rated Cap: 15
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Quote:
Originally Posted by druidwood
Didn't realize that. Foam board burns and spray foam is toxic so will have to find something else.
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Buses burn, even without foam.
How is it toxic?
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09-06-2017, 10:25 PM
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#10
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Skoolie
Join Date: Feb 2016
Location: Bemidji MN
Posts: 209
Year: 1998
Coachwork: Carpenter Body
Chassis: International 3800
Engine: DT466
Rated Cap: 65 to Zero. Folding Chair
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I skipped the framing period.
One inch foil faced under two inches of rigid with plywood directly over top.
A floating insulation floor.
PL sub flooring foam safe glue did a better job than screws, framing or folding and crushing it down.
I will never build thermal bridges in a floor again.
__________________
D.L. Jones III
"The Independence"
98 International
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09-06-2017, 10:29 PM
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#11
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Bus Nut
Join Date: Jun 2016
Location: Lafayette, Indiana
Posts: 332
Year: 2003
Engine: DT530
Rated Cap: 84
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Quote:
Originally Posted by New2Skool
I skipped the framing period.
One inch foil faced under two inches of rigid with plywood directly over top.
A floating insulation floor.
PL sub flooring foam safe glue did a better job than screws, framing or folding and crushing it down.
I will never build thermal bridges in a floor again.
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Agreed!
Rigid foam has a 15-25 psi rating so there is no need to frame.
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09-07-2017, 10:25 AM
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#12
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Skoolie
Join Date: Feb 2016
Location: Bemidji MN
Posts: 209
Year: 1998
Coachwork: Carpenter Body
Chassis: International 3800
Engine: DT466
Rated Cap: 65 to Zero. Folding Chair
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I am a big guy, 6'4 300lbs and I have not had an issue with the insulation beneath me.
It has not peeled, curled, lifted, or anything from the metal floor. I put 2x2s on the floor under the seat rail to provide an anchor point for surface walling and it also gave me a great space to mount plywood to the steel and run my electrical and plumbing without interfering with the insulation value.
An unexpected little bonus and a lot of saved framing material that can be used elsewhere.
__________________
D.L. Jones III
"The Independence"
98 International
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09-07-2017, 01:10 PM
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#13
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Member
Join Date: Aug 2017
Location: Gold Bar, WA
Posts: 125
Year: 1991
Coachwork: Bluebird
Chassis: TC 2000
Engine: 5.9 L Cummins Turbo
Rated Cap: 28
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Thank you, will check this out.
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09-07-2017, 01:52 PM
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#14
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Bus Nut
Join Date: Apr 2017
Location: Ridge Manor, FL
Posts: 311
Year: 1993
Coachwork: Carpenter
Chassis: Ford B600
Engine: Cummins 5.9
Rated Cap: 20 person
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I didn't know that about rigid foam! I am a big guy as well, 6 ft 1 280 so it was a concern.
__________________
"Living Our Own Story"
The Bowser Journal
Watch our adventures by subscribing...
Youtube - bit.ly/TheBowserJournal
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